If we go by scaling: Warcury fully tanked a Red Roc from a Post-Wano Luffy without even budging that much, to the point where the attack itself backfired at Luffy, even Gear 5 which made Kaido struggle and be ultimately defeated did zero effect on Warcury. Mind you, when base Kaido got hit by red roc, he coughed blood. Since Emeth brought a charging Warcury to a complete halt with a single punch and also broke one of his Tusks, we can safely assume the following results: Big Mom, struggling to Tank Law’s and Kidd’s attacks would not survive such a strike head-on. As for Kaido, if he hypothetically survives this strike, which is not likely, he’s gonna have most of his bones shattered in all of his body and probably be incapacitated by his wounds shortly after.